#go-top{
  position: fixed;
  z-index: 11;
  width: 40px;
  height:40px;
  right:10px;
  bottom: 90px;
  background: @main-color-b;
  color: #fff;
  line-height: 40px;
  text-align: center;
  border-radius: 20px;
  i{
    font-size: 20px;
  }
}
